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Version 225.2 by Xiaoling on 2022/12/10 09:35
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1 (% style="text-align:center" %)
2 [[image:image-20220613162008-1.png||_mstalt="428142" height="510" width="334"]]
3
4
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6
7
8 **Table of Contents：**
9
10 {{toc/}}
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14
15
16 = 1. Introduction =
17
18 == 1.1 What is LHT65N Temperature & Humidity Sensor ==
19
20
21 (((
22 The Dragino LHT65N Temperature & Humidity sensor is a Long Range LoRaWAN Sensor. It includes a (% style="color:#4f81bd" %)**built-in Temperature & Humidity sensor**(%%) and has an external sensor connector to connect to an external (% style="color:#4f81bd" %)**Temperature Sensor.**
23 )))
24
25 (((
26 The LHT65N allows users to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, building automation, and so on.
27 )))
28
29 (((
30 LHT65N has a built-in 2400mAh non-chargeable battery which can be used for up to 10 years*.
31 )))
32
33 (((
34 LHT65N is full compatible with LoRaWAN v1.0.3 Class A protocol, it can work with a standard LoRaWAN gateway.
35 )))
36
37 (((
38 LHT65N supports (% style="color:#4f81bd" %)**Datalog Feature**(%%). It will record the data when there is no network coverage and users can retrieve the sensor value later to ensure no miss for every sensor reading.
39 )))
40
41 (((
42 *The actual battery life depends on how often to send data, please see the battery analyzer chapter.
43 )))
44
45
46 == 1.2 Features ==
47
48
49 * Wall mountable
50 * LoRaWAN v1.0.3 Class A protocol
51 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915
52 * AT Commands to change parameters
53 * Remote configure parameters via LoRaWAN Downlink
54 * Firmware upgradeable via program port
55 * Built-in 2400mAh battery for up to 10 years of use.
56 * Built-in Temperature & Humidity sensor
57 * Optional External Sensors
58 * Tri-color LED to indicate working status
59 * Datalog feature (Max 3328 records)
60
61
62
63 == 1.3 Specification ==
64
65
66 (% style="color:#037691" %)**Built-in Temperature Sensor:**
67
68 * Resolution: 0.01 °C
69 * Accuracy Tolerance : Typ ±0.3 °C
70 * Long Term Drift: < 0.02 °C/yr
71 * Operating Range: -40 ~~ 85 °C
72
73 (% style="color:#037691" %)**Built-in Humidity Sensor:**
74
75 * Resolution: 0.04 %RH
76 * Accuracy Tolerance : Typ ±3 %RH
77 * Long Term Drift: < 0.02 °C/yr
78 * Operating Range: 0 ~~ 96 %RH
79
80 (% style="color:#037691" %)**External Temperature Sensor:**
81
82 * Resolution: 0.0625 °C
83 * ±0.5°C accuracy from -10°C to +85°C
84 * ±2°C accuracy from -55°C to +125°C
85 * Operating Range: -55 °C ~~ 125 °C
86
87
88
89 = 2. Connect LHT65N to IoT Server =
90
91 == 2.1 How does LHT65N work? ==
92
93
94 (((
95 LHT65N is configured as LoRaWAN OTAA Class A mode by default. Each LHT65N is shipped with a worldwide unique set of OTAA keys. To use LHT65N in a LoRaWAN network, first, we need to put the OTAA keys in LoRaWAN Network Server and then activate LHT65N.
96 )))
97
98 (((
99 If LHT65N is under the coverage of this LoRaWAN network. LHT65N can join the LoRaWAN network automatically. After successfully joining, LHT65N will start to measure environment temperature and humidity, and start to transmit sensor data to the LoRaWAN server. The default period for each uplink is 20 minutes.
100 )))
101
102
103 == 2.2 How to Activate LHT65N? ==
104
105
106 (((
107 The LHT65N has two working modes:
108 )))
109
110 * (((
111 (% style="color:blue" %)**Deep Sleep Mode**(%%): LHT65N doesn't have any LoRaWAN activation. This mode is used for storage and shipping to save battery life.
112 )))
113 * (((
114 (% style="color:blue" %)**Working Mode**(%%):  In this mode, LHT65N works as LoRaWAN Sensor mode to Join LoRaWAN network and send out the sensor data to the server. Between each sampling/tx/rx periodically, LHT65N will be in STOP mode (IDLE mode), in STOP mode, LHT65N has the same power consumption as Deep Sleep mode. 
115 )))
116
117 (((
118 The LHT65N is set in deep sleep mode by default; The ACT button on the front is to switch to different modes:
119 )))
120
121
122 [[image:image-20220515123819-1.png||_mstalt="430742" height="379" width="317"]]
123
124 [[image:image-20220525110604-2.png||_mstalt="427531"]]
125
126
127 == 2.3 Example to join LoRaWAN network ==
128
129
130 (% class="wikigeneratedid" %)
131 This section shows an example of how to join the TTN V3 LoRaWAN IoT server. Use with other LoRaWAN IoT servers is of a similar procedure.
132
133
134 (% class="wikigeneratedid" %)
135 [[image:image-20220522232442-1.png||_mstalt="427830" height="387" width="648"]]
136
137
138 (((
139 Assume the LPS8N is already set to connect to [[TTN V3 network>>url:https://eu1.cloud.thethings.network||_mstvisible="2"]], So it provides network coverage for LHT65N. Next we need to add the LHT65N device in TTN V3:
140 )))
141
142
143 === 2.3.1 Step 1: Create Device n TTN ===
144
145
146 (((
147 Create a device in TTN V3 with the OTAA keys from LHT65N.
148 )))
149
150 (((
151 Each LHT65N is shipped with a sticker with its device EUI, APP Key and APP EUI as below:
152 )))
153
154 [[image:image-20220617150003-1.jpeg||_mstalt="5426434"]]
155
156 User can enter these keys in the LoRaWAN Server portal. Below is TTN V3 screenshot:
157
158 Add APP EUI in the application.
159
160
161 [[image:image-20220522232916-3.png||_mstalt="430495"]]
162
163
164 [[image:image-20220522232932-4.png||_mstalt="430157"]]
165
166
167 [[image:image-20220522232954-5.png||_mstalt="431847"]]
168
169
170
171 (% style="color:red" %)**Note: LHT65N use same payload as LHT65.**
172
173
174 [[image:image-20220522233026-6.png||_mstalt="429403"]]
175
176
177 Input APP EUI,  APP KEY and DEV EUI:
178
179
180 [[image:image-20220522233118-7.png||_mstalt="430430"]]
181
182
183 === 2.3.2 Step 2: Activate LHT65N by pressing the ACT button for more than 5 seconds. ===
184
185
186 (((
187 Use ACT button to activate LHT65N and it will auto-join to the TTN V3 network. After join success, it will start to upload sensor data to TTN V3 and user can see in the panel.
188 )))
189
190 [[image:image-20220522233300-8.png||_mstalt="428389" height="219" width="722"]]
191
192
193 == 2.4 Uplink Payload   ( Fport~=2) ==
194
195
196 (((
197 The uplink payload includes totally 11 bytes. Uplink packets use FPORT=2 and (% style="color:#4f81bd" %)**every 20 minutes**(%%) send one uplink by default.
198 )))
199
200 (((
201 After each uplink, the (% style="color:blue" %)**BLUE LED**(%%) will blink once.
202 )))
203
204 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:390px" %)
205 |=(% style="width: 60px;" %)(((
206 **Size(bytes)**
207 )))|=(% style="width: 30px;" %)(((
208 **2**
209 )))|=(% style="width: 100px;" %)(((
210 **2**
211 )))|=(% style="width: 100px;" %)(((
212 **2**
213 )))|=(% style="width: 50px;" %)(((
214 **1**
215 )))|=(% style="width: 50px;" %)(((
216 **4**
217 )))
218 |(% style="width:97px" %)(((
219 **Value**
220 )))|(% style="width:39px" %)(((
221 [[BAT>>||anchor="H2.4.2BAT-BatteryInfo"]]
222 )))|(% style="width:100px" %)(((
223 (((
224 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
225 )))
226 )))|(% style="width:77px" %)(((
227 (((
228 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
229 )))
230 )))|(% style="width:47px" %)(((
231 [[Ext>>||anchor="H2.4.5Ext23"]] #
232 )))|(% style="width:51px" %)(((
233 [[Ext value>>||anchor="H2.4.6Extvalue"]]
234 )))
235
236 * The First 6 bytes: has fix meanings for every LHT65N.
237 * The 7th byte (EXT #): defines the external sensor model.
238 * The 8^^th^^ ~~ 11^^th^^ byte: the value for external sensor value. The definition is based on external sensor type. (If EXT=0, there won't be these four bytes.)
239
240
241
242 === 2.4.1 Decoder in TTN V3 ===
243
244
245 When the uplink payload arrives TTNv3, it shows HEX format and not friendly to read. We can add LHT65N decoder in TTNv3 for friendly reading.
246
247 Below is the position to put the decoder and LHT65N decoder can be download from here: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>https://github.com/dragino/dragino-end-node-decoder]]
248
249
250 [[image:image-20220522234118-10.png||_mstalt="451464" height="353" width="729"]]
251
252
253 === 2.4.2 BAT-Battery Info ===
254
255
256 These two bytes of BAT include the battery state and the actually voltage
257
258 [[image:image-20220523152839-18.png||_mstalt="457613"]]
259
260
261 [[image:image-20220522235639-1.png||_mstalt="431392" height="139" width="727"]]
262
263
264 Check the battery voltage for LHT65N.
265
266 * BAT status=(0Xcba4>>14)&0xFF=11(B)，very good
267 * Battery Voltage =0xCBF6&0x3FFF=0x0BA4=2980mV
268
269
270
271 === 2.4.3 Built-in Temperature ===
272
273
274 [[image:image-20220522235639-2.png||_mstalt="431756" height="138" width="722"]]
275
276 * Temperature:  0x0ABB/100=27.47℃
277
278 [[image:image-20220522235639-3.png||_mstalt="432120"]]
279
280 * Temperature:  (0xF5C6-65536)/100=-26.18℃
281
282
283
284 === 2.4.4 Built-in Humidity ===
285
286
287 [[image:image-20220522235639-4.png||_mstalt="432484" height="138" width="722"]]
288
289 * Humidity:    0x025C/10=60.4%
290
291
292
293 === 2.4.5 Ext # ===
294
295
296 Bytes for External Sensor:
297
298 [[image:image-20220523152822-17.png||_mstalt="454545"]]
299
300
301 === 2.4.6 Ext value ===
302
303 ==== 2.4.6.1 Ext~=1, E3 Temperature Sensor ====
304
305
306 [[image:image-20220522235639-5.png||_mstalt="432848"]]
307
308
309 * DS18B20 temp=0x0ADD/100=27.81℃
310
311 The last 2 bytes of data are meaningless
312
313
314
315 [[image:image-20220522235639-6.png||_mstalt="433212"]]
316
317
318 * External temperature= (0xF54F-65536)/100=-27.37℃
319
320 The last 2 bytes of data are meaningless
321
322 If the external sensor is 0x01, and there is no external temperature connected. The temperature will be set to 7FFF which is 327.67℃
323
324
325 ==== 2.4.6.2 Ext~=9, E3 sensor with Unix Timestamp ====
326
327
328 (((
329 Timestamp mode is designed for LHT65N with E3 probe, it will send the uplink payload with Unix timestamp. With the limitation of 11 bytes (max distance of AU915/US915/AS923 band), the time stamp mode will be lack of BAT voltage field, instead, it shows the battery status. The payload is as below:
330 )))
331
332 (((
333
334 )))
335
336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
337 |=(% style="width: 50px;" %)(((
338 **Size(bytes)**
339 )))|=(% style="width: 70px;" %)(((
340 **2**
341 )))|=(% style="width: 120px;" %)(((
342 **2**
343 )))|=(% style="width: 120px;" %)(((
344 **2**
345 )))|=(% style="width: 50px;" %)(((
346 **1**
347 )))|=(% style="width: 70px;" %)(((
348 **4**
349 )))
350 |(% style="width:110px" %)(((
351 **Value**
352 )))|(% style="width:71px" %)(((
353 [[External temperature>>||anchor="H4.2SetExternalSensorMode"]]
354 )))|(% style="width:99px" %)(((
355 [[Built-In Temperature>>||anchor="H2.4.3Built-inTemperature"]]
356 )))|(% style="width:132px" %)(((
357 BAT Status & [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
358 )))|(% style="width:54px" %)(((
359 Status & Ext
360 )))|(% style="width:64px" %)(((
361 [[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
362 )))
363
364 * **Battery status & Built-in Humidity**
365
366 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:461px" %)
367 |=(% style="width: 67px;" %)Bit(bit)|=(% style="width: 256px;" %)[15:14]|=(% style="width: 132px;" %)[11:0]
368 |(% style="width:67px" %)Value|(% style="width:256px" %)(((
369 BAT Status
370 00(b): Ultra Low ( BAT <= 2.50v)
371 01(b): Low  (2.50v <=BAT <= 2.55v)
372 10(b): OK   (2.55v <= BAT <=2.65v)
373 11(b): Good   (BAT >= 2.65v)
374 )))|(% style="width:132px" %)(((
375 [[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]
376 )))
377
378 * **Status & Ext Byte**
379
380 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
381 |=(% scope="row" style="width: 60px;" %)**Bits**|(% style="width:90px" %)**7**|(% style="width:100px" %)**6**|(% style="width:90px" %)**5**|(% style="width:100px" %)**4**|(% style="width:60px" %)**[3:0]**
382 |=(% style="width: 96px;" %)**Status&Ext**|(% style="width:124px" %)None-ACK Flag|(% style="width:146px" %)Poll Message FLAG|(% style="width:109px" %)Sync time OK|(% style="width:143px" %)Unix Time Request|(% style="width:106px" %)Ext: 0b(1001)
383
384 * (% style="color:blue" %)**Poll Message Flag**:(%%)  1: This message is a poll message reply, 0: means this is a normal uplink.
385 * (% style="color:blue" %)**Sync time OK**: (%%) 1: Set time ok，0: N/A. After time SYNC request is sent, LHT65N will set this bit to 0 until got the time stamp from the application server.
386 * (% style="color:blue" %)**Unix Time Request**:(%%)  1: Request server downlink Unix time, 0 : N/A. In this mode, LHT65N will set this bit to 1 every 10 days to request a time SYNC. (AT+SYNCMOD to set this)
387
388
389
390 ==== 2.4.6.3 Ext~=6, ADC Sensor (use with E2 Cable) ====
391
392
393 In this mode, user can connect external ADC sensor to check ADC value. The 3V3_OUT can
394
395 be used to power the external ADC sensor; user can control the power on time for this
396
397 (% style="color:blue" %)**sensor by setting:**
398
399 **AT+EXT=6,timeout**  (% style="color:red" %)**Time to power this sensor, from 0 ~~ 65535ms**
400
401 **For example:**
402
403 AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
404
405
406 Or use **downlink command A2** to set the same.
407
408 The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
409
410 When the measured output voltage of the sensor is not within the range of 0.1V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
411
412 [[image:image-20220628150112-1.png||_mstalt="427414" height="241" width="285"]]
413
414
415 When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
416
417 [[image:image-20220628150714-4.png||_mstalt="431054"]]
418
419
420 When the voltage collected by ADC_IN1 is less than the minimum range, the minimum range will be used as the output; Similarly, when the collected voltage is greater than the maximum range, the maximum range will be used as the output.
421
422
423 1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
424
425 [[image:image-20220628151005-5.png||_mstalt="429546"]]
426
427
428 2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
429
430 [[image:image-20220628151056-6.png||_mstalt="431873"]]
431
432
433 3) Within range
434
435 [[image:image-20220628151143-7.png||_mstalt="431210"]]
436
437
438 ==== 2.4.6.4 Ext~=2 TMP117 Sensor （Since Firmware v1.3） ====
439
440
441 [[image:image-20220927095645-1.png||_mstalt="433771" height="534" width="460"]]
442
443
444 (% style="color:blue" %)**Ext=2,Temperature Sensor(TMP117)：**
445
446 [[image:image-20220906102307-7.png||_mstalt="430443"]]
447
448
449 (% style="color:blue" %)**Interrupt Mode and Counting Mode:**
450
451 The external cable NE2 can be use for MOD4 and MOD8
452
453
454 ==== 2.4.6.5 Ext~=4 Interrupt Mode （Since Firmware v1.3） ====
455
456
457 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will send an uplink when there is a trigger.**
458
459
460 (% style="color:blue" %)**Interrupt Mode can be used to connect to external interrupt sensors such as:**
461
462 (% style="color:#037691" %)**Case 1: Door Sensor.** (%%)3.3v Out for such sensor is just to detect Open/Close.
463
464 In Open State, the power consumption is the same as if there is no probe
465
466 In Close state, the power consumption will be 3uA higher than normal.
467
468 [[image:image-20220906100852-1.png||_mstalt="429156" height="205" width="377"]]
469
470
471 Ext=4,Interrupt Sensor：
472
473 (% border="1.5" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:478px" %)
474 |(% style="width:101px" %)(((
475 AT+EXT=4,1
476 )))|(% style="width:373px" %)(((
477 Sent uplink packet in both rising and falling interrupt
478 )))
479 |(% style="width:101px" %)(((
480 AT+EXT=4,2
481 )))|(% style="width:373px" %)(((
482 Sent uplink packet only in falling interrupt
483 )))
484 |(% style="width:101px" %)(((
485 AT+EXT=4,3
486 )))|(% style="width:373px" %)(((
487 Sent uplink packet only in rising interrupt
488 )))
489
490 Trigger by falling edge:
491
492 [[image:image-20220906101145-2.png||_mstalt="428324"]]
493
494
495 Trigger by raising edge：
496
497 [[image:image-20220906101145-3.png||_mstalt="428688"]]
498
499
500 ==== 2.4.6.6 Ext~=8 Counting Mode（Since Firmware v1.3） ====
501
502
503 (% style="color:red" %)**Note: In this mode, 3.3v output will be always ON. LHT65N will count for every interrupt and uplink periodically.**
504
505
506 (% style="color:blue" %)**Case 1**(%%):  Low power consumption Flow Sensor, such flow sensor has pulse output and the power consumption in uA level and can be powered by LHT65N.
507
508 [[image:image-20220906101320-4.png||_mstalt="427336" height="366" width="698"]]
509
510
511 (% style="color:blue" %)**Case 2**(%%):  Normal Flow Sensor: Such flow sensor has higher power consumption and is not suitable to be powered by LHT65N. It is powered by external power and output <3.3v pulse
512
513 [[image:image-20220906101320-5.png||_mstalt="427700" height="353" width="696"]]
514
515
516 Ext=8, Counting Sensor ( 4 bytes)：
517
518 (% border="2" cellpadding="4" cellspacing="4" style="background-color:#ffffcc; color:green; height:6px; width:381px" %)
519 |(% style="width:138px" %)(((
520 AT+EXT=8,0
521 )))|(% style="width:240px" %)(((
522 Count at falling interrupt
523 )))
524 |(% style="width:138px" %)(((
525 AT+EXT=8,1
526 )))|(% style="width:240px" %)(((
527 Count at rising interrupt
528 )))
529 |(% style="width:138px" %)(((
530 AT+SETCNT=60
531 )))|(% style="width:240px" %)(((
532 Sent current count to 60
533 )))
534
535 [[image:image-20220906101320-6.png||_mstalt="428064"]]
536
537
538 (% style="color:blue" %)**A2 downlink Command：**
539
540 A2 02:  Same as AT+EXT=2 (AT+EXT= second byte)
541
542 A2 06 01 F4:  Same as AT+EXT=6,500 (AT+EXT= second byte, third and fourth bytes)
543
544 A2 04 02:  Same as AT+EXT=4,2 (AT+EXT= second byte, third byte)
545
546 A2 08 01 00:  Same as AT+EXT=8,0 (AT+EXT= second byte, fourth byte)
547
548 A2 08 02 00 00 00 3C:  Same as AT+ SETCNT=60  (AT+ SETCNT = 4th byte and 5th byte and 6th byte and 7th byte)
549
550
551 == 2.5 Show data on Datacake ==
552
553
554 (((
555 Datacake IoT platform provides a human-friendly interface to show the sensor data, once we have sensor data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:
556 )))
557
558 (((
559
560 )))
561
562 (((
563 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the LoRaWAN network.
564 )))
565
566 (((
567 (% style="color:blue" %)**Step 2**(%%): Configure your Application to forward data to Datacake you will need to add integration. Go to TTN V3 Console ~-~-> Applications ~-~-> Integrations ~-~-> Add Integrations.
568 )))
569
570 (((
571
572 )))
573
574 (((
575 Add Datacake:
576 )))
577
578
579 [[image:image-20220523000825-7.png||_mstalt="429884" height="262" width="583"]]
580
581
582
583 Select default key as Access Key:
584
585
586 [[image:image-20220523000825-8.png||_mstalt="430248" height="453" width="406"]]
587
588
589 In Datacake console ([[https:~~/~~/datacake.co/>>url:https://datacake.co/]]) , add LHT65 device.
590
591
592 [[image:image-20220523000825-9.png||_mstalt="430612" height="366" width="392"]]
593
594
595 [[image:image-20220523000825-10.png||_mstalt="450619" height="413" width="728"]]
596
597
598 == 2.6 Datalog Feature ==
599
600
601 (((
602 Datalog Feature is to ensure IoT Server can get all sampling data from Sensor even if the LoRaWAN network is down. For each sampling, LHT65N will store the reading for future retrieving purposes. There are two ways for IoT servers to get datalog from LHT65N.
603 )))
604
605
606 === 2.6.1 Ways to get datalog via LoRaWAN ===
607
608
609 There are two methods:
610
611 (% style="color:blue" %)**Method 1:** (%%)IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specified time range.
612
613
614 (% style="color:blue" %)**Method 2: **(%%)Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will mark these records with non-ack messages and store the sensor data, and it will send all messages (10s interval) after the network recovery.
615
616
617 (% style="color:red" %)**Note for method 2:**
618
619 * a) LHT65N will do an ACK check for data records sending to make sure every data arrive server.
620 * b) LHT65N will send data in **CONFIRMED Mode** when PNACKMD=1, but LHT65N won't re-transmit the packet if it doesn't get ACK, it will just mark it as a NONE-ACK message. In a future uplink if LHT65N gets a ACK, LHT65N will consider there is a network connection and resend all NONE-ACK Message.
621
622 Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
623
624
625 [[image:image-20220703111700-2.png||_mstalt="426244" height="381" width="1119"]]
626
627
628 === 2.6.2 Unix TimeStamp ===
629
630
631 LHT65N uses Unix TimeStamp format based on
632
633
634 [[image:image-20220523001219-11.png||_mstalt="450450" height="97" width="627"]]
635
636
637
638 User can get this time from link:  [[https:~~/~~/www.epochconverter.com/>>url:https://www.epochconverter.com/]] :
639
640 Below is the converter example
641
642 [[image:image-20220523001219-12.png||_mstalt="450827" height="298" width="720"]]
643
644
645 So, we can use AT+TIMESTAMP=1611889405 or downlink 3060137afd00 to set the current time 2021 – Jan ~-~- 29 Friday 03:03:25
646
647
648 === 2.6.3 Set Device Time ===
649
650
651 (((
652 (% style="color:blue" %)**There are two ways to set device's time:**
653 )))
654
655 (((
656 **1.  Through LoRaWAN MAC Command (Default settings)**
657 )))
658
659 (((
660 User need to set SYNCMOD=1 to enable sync time via MAC command.
661 )))
662
663 (((
664 Once LHT65N Joined LoRaWAN network, it will send the MAC command (DeviceTimeReq) and the server will reply with (DeviceTimeAns) to send the current time to LHT65N. If LHT65N fails to get the time from the server, LHT65N will use the internal time and wait for next time request (AT+SYNCTDC to set the time request period, default is 10 days).
665 )))
666
667 (((
668 (% style="color:red" %)**Note: LoRaWAN Server need to support LoRaWAN v1.0.3(MAC v1.0.3) or higher to support this MAC command feature, Chirpstack,TTN V3 v3 and loriot support but TTN V3 v2 doesn't support. If server doesn't support this command, it will through away uplink packet with this command, so user will lose the packet with time request for TTN V3 v2 if SYNCMOD=1.**
669 )))
670
671
672 (((
673 **2. Manually Set Time**
674 )))
675
676 (((
677 User needs to set SYNCMOD=0 to manual time, otherwise, the user set time will be overwritten by the time set by the server.
678 )))
679
680
681 === 2.6.4 Poll sensor value ===
682
683
684 User can poll sensor value based on timestamps from the server. Below is the downlink command.
685
686 [[image:image-20220523152302-15.png||_mstalt="451581"]]
687
688
689 Timestamp start and Timestamp end use Unix TimeStamp format as mentioned above. Devices will reply with all data log during this time period, use the uplink interval.
690
691 For example, downlink command (% _mstmutation="1" %)**31 5FC5F350 5FC6 0160 05**(%%)
692
693 Is to check 2020/12/1 07:40:00 to 2020/12/1 08:40:00's data
694
695 Uplink Internal =5s，means LHT65N will send one packet every 5s. range 5~~255s.
696
697
698 === 2.6.5 Datalog Uplink payload ===
699
700
701 The Datalog poll reply uplink will use below payload format.
702
703 **Retrieval data payload:**
704
705 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:480px" %)
706 |=(% style="width: 60px;" %)(((
707 **Size(bytes)**
708 )))|=(% style="width: 90px;" %)**2**|=(% style="width: 90px;" %)**2**|=(% style="width: 70px;" %)**2**|=(% style="width: 100px;" %)**1**|=(% style="width: 70px;" %)**4**
709 |(% style="width:97px" %)**Value**|(% style="width:123px" %)[[External sensor data>>||anchor="H2.4.6Extvalue"]]|(% style="width:108px" %)[[Built In Temperature>>||anchor="H2.4.3Built-inTemperature"]]|(% style="width:133px" %)[[Built-in Humidity>>||anchor="H2.4.4Built-inHumidity"]]|(% style="width:159px" %)Poll message flag & Ext|(% style="width:80px" %)[[Unix Time Stamp>>||anchor="H2.6.2UnixTimeStamp"]]
710
711 **Poll message flag & Ext:**
712
713 [[image:image-20221006192726-1.png||_mstalt="430508" height="112" width="754"]]
714
715 (% style="color:blue" %)**No ACK Message**(%%):  1: This message means this payload is fromn Uplink Message which doesn't get ACK from the server before ( for [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]] feature)
716
717 (% style="color:blue" %)**Poll Message Flag**(%%): 1: This message is a poll message reply.
718
719 * Poll Message Flag is set to 1.
720
721 * Each data entry is 11 bytes, to save airtime and battery, devices will send max bytes according to the current DR and Frequency bands.
722
723 For example, in US915 band, the max payload for different DR is:
724
725 (% style="color:blue" %)**a) DR0:** (%%)max is 11 bytes so one entry of data
726
727 (% style="color:blue" %)**b) DR1:**(%%) max is 53 bytes so devices will upload 4 entries of data (total 44 bytes)
728
729 (% style="color:blue" %)**c) DR2:**(%%) total payload includes 11 entries of data
730
731 (% style="color:blue" %)**d) DR3: **(%%)total payload includes 22 entries of data.
732
733 If devise doesn't have any data in the polling time. Device will uplink 11 bytes of 0   
734
735
736 **Example:**
737
738 If LHT65N has below data inside Flash:
739
740 [[image:image-20220523144455-1.png||_mstalt="430040" height="335" width="735"]]
741
742
743 If user sends below downlink command: (% style="background-color:yellow" %)3160065F9760066DA705
744
745 Where : Start time: 60065F97 = time 21/1/19 04:27:03
746
747 Stop time: 60066DA7= time 21/1/19 05:27:03
748
749
750 **LHT65N will uplink this payload.**
751
752 [[image:image-20220523001219-13.png||_mstalt="451204" height="421" style="text-align:left" width="727"]]
753
754
755 __**7FFF089801464160065F97**__ **__7FFF__ __088E__ __014B__ __41__ __60066009__** 7FFF0885014E41600660667FFF0875015141600662BE7FFF086B015541600665167FFF08660155416006676E7FFF085F015A41600669C67FFF0857015D4160066C1E
756
757 Where the first 11 bytes is for the first entry:
758
759 7FFF089801464160065F97
760
761 Ext sensor data=0x7FFF/100=327.67
762
763 Temp=0x088E/100=22.00
764
765 Hum=0x014B/10=32.6
766
767 poll message flag & Ext=0x41,means reply data,Ext=1
768
769 Unix time is 0x60066009=1611030423s=21/1/19 04:27:03
770
771
772 == 2.7 Alarm Mode & Feature "Multi sampling, one uplink" ==
773
774
775 (((
776 when the device is in alarm mode, it checks the built-in sensor temperature for a short time. if the temperature exceeds the preconfigured range, it sends an uplink immediately.
777 )))
778
779 (((
780 (% style="color:red" %)**Note: alarm mode adds a little power consumption, and we recommend extending the normal read time when this feature is enabled.**
781
782
783 === 2.7.1 ALARM MODE ( Since v1.3.1 firmware) ===
784
785
786 **Internal GXHT30 temperature alarm（Acquisition time: fixed at one minute）**
787
788 (((
789 (% class="box infomessage" %)
790 (((
791 **AT+WMOD=3**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
792
793 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
794
795 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
796
797 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
798
799 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
800
801 **AT+LEDALARM=1** :       Enable LED visual Alarm.
802 )))
803 )))
804
805 (% style="color:#4f81bd" %)**Downlink Command:**
806
807 AT+WMOD=1:  A501  ,  AT+WMOD=0 :  A600
808
809 AT+CITEMP=1 : A60001
810
811 AT+ARTEMP=1,60  :  A70001003C
812
813 AT+ARTEMP=-16,60 :  A7FFF0003C
814
815 AT+LEDALARM=1  :  3601
816
817
818 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
819
820 Total bytes: 8 bytes
821
822 **Example: **AA0100010001003C
823
824 WMOD=01
825
826 CITEMP=0001
827
828 TEMPlow=0001
829
830 TEMPhigh=003C
831
832
833 **DS18B20 and TMP117 Threshold Alarm**
834
835 **~ AT+WMOD=1,60,-10,20**
836
837 (% style="color:#4f81bd" %)**Downlink Command:**
838
839 **Example: **A5013CFC180014
840
841 MOD=01
842
843 CITEMP=3C(S)
844
845 TEMPlow=FC18
846
847 TEMPhigh=0014
848
849
850 **Fluctuation alarm for DS18B20 and TMP117（Acquisition time: minimum 1s）**
851
852 **AT+WMOD=2,60,5** 
853
854 (% style="color:#4f81bd" %)**Downlink Command:**
855
856 **Example: **A5023C05
857
858 MOD=02
859
860 CITEMP=3C(S)
861
862 temperature fluctuation=05
863
864
865 ==== **Sampling multiple times and uplink together** ====
866
867 **AT+WMOD=3,1,60,20,-16,32,1**   
868
869 Explain:
870
871 * Set Working Mode to **Mode 3**
872 * Sampling Interval is **60**s.
873 * When there is **20** sampling dats, Device will send these data via one uplink. (max value is 60, means max 60 sampling in one uplink)
874 * Temperature alarm range is **-16** to **32**°C,
875 * **1** to enable temperature alarm, **0** to disable the temperature alarm. If alarm is enabled, a data will be sent immediately  if temperate exceeds the Alarm range.
876
877 (% style="color:#4f81bd" %)**Downlink Command:**
878
879 **Example: **A50301003C14FFF0002001
880
881 MOD=03
882
883 EXT=01
884
885 CITEMP=003C(S)
886
887 Total number of acquisitions=14
888
889 TEMPlow=FFF0
890
891 TEMPhigh=0020
892
893 ARTEMP=01
894
895
896 **Uplink payload( Fport=3)**
897
898 **Example: CBEA**01**0992**//0A41//**09C4**
899
900 BatV=CBEA
901
902 EXT=01
903
904 Temp1=0992  ~/~/ 24.50℃
905
906 Temp2=0A41  ~/~/ 26.25℃
907
908 Temp3=09C4  ~/~/ 25.00℃
909
910
911 (% style="color:red" %)**Note: This uplink will automatically select the appropriate DR according to the data length**
912
913 (% style="color:red" %)** In this mode, the temperature resolution of ds18b20 is 0.25℃ to save power consumption**
914 )))
915
916
917 === 2.7.2 ALARM MODE ( Before v1.3.1 firmware) ===
918
919
920 (% class="box infomessage" %)
921 (((
922 (((
923 **AT+WMOD=1**:  Enable/disable alarm mode. (0: Disabled, 1: Enabled Temperature Alarm for onboard temperature sensor)
924 )))
925
926 (((
927 **AT+CITEMP=1**:  The interval between checking the alarm temperature. (In minutes)
928 )))
929
930 (((
931 **AT+ARTEMP**:  Gets or sets the alarm range of the internal temperature sensor
932 )))
933
934 (((
935 (% _mstmutation="1" %)**AT+ARTEMP=？ **(%%):  Gets the alarm range of the internal temperature sensor(% style="display:none" %)
936 )))
937
938 (((
939 **AT+ARTEMP=45,105**:  Set the internal temperature sensor alarm range from 45 to 105.
940 )))
941 )))
942
943 (% style="color:#4f81bd" %)**Downlink Command: AAXXXXXXXXXXXXXX**
944
945 Total bytes: 8 bytes
946
947 **Example:**AA0100010001003C
948
949 WMOD=01
950
951 CITEMP=0001
952
953 TEMPlow=0001
954
955 TEMPhigh=003C
956
957
958 == 2.8 LED Indicator ==
959
960
961 The LHT65 has a triple color LED which for easy showing different stage .
962
963 While user press ACT button, the LED will work as per LED status with ACT button.
964
965 In a normal working state:
966
967 * For each uplink, the BLUE LED or RED LED will blink once.
968 BLUE LED when external sensor is connected.
969 * RED LED when external sensor is not connected
970 * For each success downlink, the PURPLE LED will blink once
971
972
973
974 == 2.9 installation ==
975
976
977 [[image:image-20220516231650-1.png||_mstalt="428597" height="436" width="428"]]
978
979
980 = 3. Sensors and Accessories =
981
982 == 3.1 E2 Extension Cable ==
983
984
985 [[image:image-20220619092222-1.png||_mstalt="429533" height="182" width="188"]][[image:image-20220619092313-2.png||_mstalt="430222" height="182" width="173"]]
986
987
988 **1m long breakout cable for LHT65N. Features:**
989
990 * (((
991 Use for AT Command， works for both LHT52/LHT65N
992 )))
993 * (((
994 Update firmware for LHT65N, works for both LHT52/LHT65N
995 )))
996 * (((
997 Supports ADC mode to monitor external ADC
998 )))
999 * (((
1000 Supports Interrupt mode
1001 )))
1002 * (((
1003 Exposed All pins from the LHT65N Type-C connector.
1004
1005
1006
1007 )))
1008
1009 [[image:image-20220619092421-3.png||_mstalt="430547" height="371" width="529"]]
1010
1011
1012 == 3.2 E3 Temperature Probe ==
1013
1014
1015 [[image:image-20220515080154-4.png||_mstalt="434681" alt="photo-20220515080154-4.png" height="182" width="161"]] [[image:image-20220515080330-5.png||_mstalt="428792" height="201" width="195"]]
1016
1017
1018 Temperature sensor with 2 meters cable long
1019
1020 * Resolution: 0.0625 °C
1021 * ±0.5°C accuracy from -10°C to +85°C
1022 * ±2°C accuracy from -55°C to +125°C
1023 * Operating Range: -40 ~~ 125 °C
1024 * Working voltage 2.35v ~~ 5v
1025
1026
1027
1028 = 4. Configure LHT65N via AT command or LoRaWAN downlink =
1029
1030
1031 (((
1032 Use can configure LHT65N via AT Command or LoRaWAN Downlink.
1033 )))
1034
1035 * (((
1036 AT Command Connection: See [[FAQ>>||anchor="H6.FAQ"]].
1037 )))
1038
1039 * (((
1040 LoRaWAN Downlink instruction for different platforms: [[IoT LoRaWAN Server>>doc:Main.WebHome]]
1041 )))
1042
1043 (((
1044 There are two kinds of commands to configure LHT65N, they are:
1045 )))
1046
1047 * (((
1048 (% style="color:#4f81bd" %)**General Commands**.
1049 )))
1050
1051 (((
1052 These commands are to configure:
1053 )))
1054
1055 1. (((
1056 General system settings like: uplink interval.
1057 )))
1058 1. (((
1059 LoRaWAN protocol & radio-related commands.
1060 )))
1061
1062 (((
1063 They are the same for all Dragino Devices which supports DLWS-005 LoRaWAN Stack(Note~*~*). These commands can be found on the wiki: [[End Device Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
1064 )))
1065
1066 * (((
1067 (% style="color:#4f81bd" %)**Commands special design for LHT65N**
1068 )))
1069
1070 (((
1071 These commands are only valid for LHT65N, as below:
1072 )))
1073
1074
1075 == 4.1 Set Transmit Interval Time ==
1076
1077
1078 Feature: Change LoRaWAN End Node Transmit Interval.
1079
1080
1081 (% style="color:#4f81bd" %)**AT Command: AT+TDC**
1082
1083 [[image:image-20220523150701-2.png||_mstalt="427453"]]
1084
1085
1086 (% style="color:#4f81bd" %)**Downlink Command: 0x01**
1087
1088 Format: Command Code (0x01) followed by 3 bytes time value.
1089
1090 If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
1091
1092 * **Example 1**: Downlink Payload: 0100001E  ~/~/ Set Transmit Interval (TDC) = 30 seconds
1093
1094 * **Example 2**: Downlink Payload: 0100003C  ~/~/ Set Transmit Interval (TDC) = 60 seconds
1095
1096
1097
1098 == 4.2 Set External Sensor Mode ==
1099
1100
1101 Feature: Change External Sensor Mode.
1102
1103
1104 (% style="color:#4f81bd" %)**AT Command: AT+EXT**
1105
1106 [[image:image-20220523150759-3.png||_mstalt="432146"]]
1107
1108
1109 (% style="color:#4f81bd" %)**Downlink Command: 0xA2**
1110
1111 Total bytes: 2 ~~ 5 bytes
1112
1113 **Example:**
1114
1115 * 0xA201: Set external sensor type to E1
1116
1117 * 0xA209: Same as AT+EXT=9
1118
1119 * 0xA20702003c: Same as AT+SETCNT=60
1120
1121
1122
1123 == 4.3 Enable/Disable uplink Temperature probe ID ==
1124
1125
1126 (((
1127 Feature: If PID is enabled, device will send the temperature probe ID on:
1128 )))
1129
1130 * (((
1131 First Packet after OTAA Join
1132 )))
1133 * (((
1134 Every 24 hours since the first packet.
1135 )))
1136
1137 (((
1138 PID is default set to disable (0)
1139
1140
1141 )))
1142
1143 (% style="color:#4f81bd" %)**AT Command:**
1144
1145 [[image:image-20220523150928-4.png||_mstalt="431821"]]
1146
1147
1148 (% style="color:#4f81bd" %)**Downlink Command:**
1149
1150 * **0xA800**  **~-~->** AT+PID=0
1151 * **0xA801**     **~-~->** AT+PID=1
1152
1153
1154
1155 == 4.4 Set Password ==
1156
1157
1158 Feature: Set device password, max 9 digits
1159
1160
1161 (% style="color:#4f81bd" %)**AT Command: AT+PWORD**
1162
1163 [[image:image-20220523151052-5.png||_mstalt="428623"]]
1164
1165
1166 (% style="color:#4f81bd" %)**Downlink Command:**
1167
1168 No downlink command for this feature.
1169
1170
1171 == 4.5 Quit AT Command ==
1172
1173
1174 Feature: Quit AT Command mode, so user needs to input password again before use AT Commands.
1175
1176
1177 (% style="color:#4f81bd" %)**AT Command: AT+DISAT**
1178
1179 [[image:image-20220523151132-6.png||_mstalt="428649"]]
1180
1181
1182 (% style="color:#4f81bd" %)**Downlink Command:**
1183
1184 No downlink command for this feature.
1185
1186
1187 == 4.6 Set to sleep mode ==
1188
1189
1190 Feature: Set device to sleep mode
1191
1192 * **AT+Sleep=0**  : Normal working mode, device will sleep and use lower power when there is no LoRa message
1193 * **AT+Sleep=1** :  Device is in deep sleep mode, no LoRa activation happen, used for storage or shipping.
1194
1195 (% style="color:#4f81bd" %)**AT Command: AT+SLEEP**
1196
1197 [[image:image-20220523151218-7.png||_mstalt="430703"]]
1198
1199
1200 (% style="color:#4f81bd" %)**Downlink Command:**
1201
1202 * There is no downlink command to set to Sleep mode.
1203
1204
1205
1206 == 4.7 Set system time ==
1207
1208
1209 Feature: Set system time, unix format. [[See here for format detail.>>||anchor="H2.6.2UnixTimeStamp"]]
1210
1211
1212 (% style="color:#4f81bd" %)**AT Command:**
1213
1214 [[image:image-20220523151253-8.png||_mstalt="430677"]]
1215
1216
1217 (% style="color:#4f81bd" %)**Downlink Command:**
1218
1219 0x306007806000  ~/~/  Set timestamp to 0x(6007806000),Same as AT+TIMESTAMP=1611104352
1220
1221
1222 == 4.8 Set Time Sync Mode ==
1223
1224
1225 (((
1226 Feature: Enable/Disable Sync system time via LoRaWAN MAC Command (DeviceTimeReq), LoRaWAN server must support v1.0.3 protocol to reply this command.
1227 )))
1228
1229 (((
1230 SYNCMOD is set to 1 by default. If user want to set a different time from LoRaWAN server, user need to set this to 0.
1231
1232
1233 )))
1234
1235 (% style="color:#4f81bd" %)**AT Command:**
1236
1237 [[image:image-20220523151336-9.png||_mstalt="431717"]]
1238
1239
1240 (% style="color:#4f81bd" %)**Downlink Command:**
1241
1242 0x28 01  ~/~/  Same As AT+SYNCMOD=1
1243 0x28 00  ~/~/  Same As AT+SYNCMOD=0
1244
1245
1246 == 4.9 Set Time Sync Interval ==
1247
1248
1249 Feature: Define System time sync interval. SYNCTDC default value: 10 days.
1250
1251
1252 (% style="color:#4f81bd" %)**AT Command:**
1253
1254 [[image:image-20220523151411-10.png||_mstalt="449696"]]
1255
1256
1257 (% style="color:#4f81bd" %)**Downlink Command:**
1258
1259 **0x29 0A**  ~/~/ Same as AT+SYNCTDC=0x0A
1260
1261
1262 == 4.10 Print data entries base on page. ==
1263
1264
1265 Feature: Print the sector data from start page to stop page (max is 416 pages).
1266
1267
1268 (% style="color:#4f81bd" %)**AT Command: AT+PDTA**
1269
1270 [[image:image-20220523151450-11.png||_mstalt="451035"]]
1271
1272
1273 (% style="color:#4f81bd" %)**Downlink Command:**
1274
1275 No downlink commands for feature
1276
1277
1278 == 4.11 Print last few data entries. ==
1279
1280
1281 Feature: Print the last few data entries
1282
1283
1284 (% style="color:#4f81bd" %)**AT Command: AT+PLDTA**
1285
1286 [[image:image-20220523151524-12.png||_mstalt="452101"]]
1287
1288
1289 (% style="color:#4f81bd" %)**Downlink Command:**
1290
1291 No downlink commands for feature
1292
1293
1294 == 4.12 Clear Flash Record ==
1295
1296
1297 Feature: Clear flash storage for data log feature.
1298
1299
1300 (% style="color:#4f81bd" %)**AT Command: AT+CLRDTA**
1301
1302 [[image:image-20220523151556-13.png||_mstalt="454129"]]
1303
1304
1305 (% style="color:#4f81bd" %)**Downlink Command: 0xA3**
1306
1307 * Example: 0xA301  ~/~/  Same as AT+CLRDTA
1308
1309
1310
1311 == 4.13 Auto Send None-ACK messages ==
1312
1313
1314 Feature: LHT65N will wait for ACK for each uplink, If LHT65N doesn't get ACK from the IoT server, it will consider the message doesn't arrive server and store it. LHT65N keeps sending messages in normal periodically. Once LHT65N gets ACK from a server, it will consider the network is ok and start to send the not-arrive message.
1315
1316
1317 (% style="color:#4f81bd" %)**AT Command: AT+PNACKMD**
1318
1319 The default factory setting is 0
1320
1321 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:367px" %)
1322 |=(% style="width: 158px;" %)**Command Example**|=(% style="width: 118px;" %)**Function**|=(% style="width: 87px;" %)**Response**
1323 |(% style="width:158px" %)AT+PNACKMD=1|(% style="width:118px" %)Poll None-ACK message|(% style="width:87px" %)OK
1324
1325 (% style="color:#4f81bd" %)**Downlink Command: 0x34**
1326
1327 * Example: 0x3401  ~/~/  Same as AT+PNACKMD=1
1328
1329
1330
1331 == 4.14 Modified WMOD command for external sensor TMP117 or DS18B20 temperature alarm（Since firmware 1.3.0） ==
1332
1333
1334 Feature: Set internal and external temperature sensor alarms.
1335
1336 (% border="1" cellspacing="4" style="background-color:#ffffcc; color:green; width:500px" %)
1337 |=(% style="width: 250px;" %)**Command Example**|=(% style="width: 200px;" %)**Function**|=(% style="width: 50px;" %)**Response**
1338 |(% style="width:268px" %)AT+WMOD=parameter1,parameter2,parameter3,parameter4|(% style="width:255px" %)Set internal and external temperature sensor alarms|(% style="width:181px" %)OK
1339
1340 (% style="color:#037691" %)**AT+WMOD=parameter1,parameter2,parameter3,parameter4**
1341
1342 (% style="color:#037691" %)**Parameter 1**(%%):  Alarm mode:
1343
1344 0): Cancel
1345
1346 1): Threshold alarm
1347
1348 2): Fluctuation alarm
1349
1350
1351 (% style="color:#037691" %)** Parameter 2**(%%):  Sampling time. Unit: seconds, up to 255 seconds.
1352
1353 (% style="color:red" %)**Note: When the collection time is less than 60 seconds and always exceeds the set alarm threshold, the sending interval will not be the collection time, but will be sent every 60 seconds.**
1354
1355
1356 (% style="color:#037691" %) **Parameter 3 and parameter 4:**
1357
1358 1):  If Alarm Mode is set to 1: Parameter 3 and parameter 4 are valid, as before, they represent low temperature and high temperature.
1359
1360 Such as AT+WMOD=1,60,45,105, it means high and low temperature alarm.
1361
1362
1363 2):  If Alarm Mode is set to 2: Parameter 3 is valid, which represents the difference between the currently collected temperature and the last uploaded temperature.
1364
1365 Such as AT+WMOD=2,10,2,it means that it is a fluctuation alarm.
1366
1367 If the difference between the current collected temperature and the last Uplin is ±2 degrees, the alarm will be issued.
1368
1369
1370 (% style="color:#4f81bd" %)**Downlink Command: 0xA5**
1371
1372 0xA5 00 ~-~- AT+WMOD=0.
1373
1374 0xA5 01 0A 11 94 29 04 ~-~- AT+WMOD=1,10,45,105  (AT+WMOD = second byte, third byte, fourth and fifth bytes divided by 100, sixth and seventh bytes divided by 100 )
1375
1376 0XA5 01 0A F9 C0 29 04 ~-~-AT+WMOD=1,10,-16,105(Need to convert -16 to -1600 for calculation，-1600(DEC)=FFFFFFFFFFFFF9C0(HEX)  FFFFFFFFFFFFF9C0(HEX) +10000(HEX)=F9C0(HEX))
1377
1378 0xA5 02 0A 02 ~-~- AT+WMOD=2,10,2  (AT+WMOD = second byte, third byte, fourth byte)
1379
1380 0xA5 FF ~-~- After the device receives it, upload the current alarm configuration (FPORT=8). Such as 01 0A 11 94 29 04 or 02 0A 02.
1381
1382
1383 = 5. Battery & How to replace =
1384
1385 == 5.1 Battery Type ==
1386
1387
1388 (((
1389 LHT65N is equipped with a 2400mAH Li-MnO2 (CR17505) battery . The battery is an un-rechargeable battery with low discharge rate targeting for up to 8~~10 years use. This type of battery is commonly used in IoT devices for long-term running, such as water meters.
1390 )))
1391
1392 (((
1393 The discharge curve is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
1394
1395
1396 [[image:image-20220515075034-1.png||_mstalt="428961" height="208" width="644"]]
1397 )))
1398
1399 The minimum Working Voltage for the LHT65N is ~~ 2.5v. When battery is lower than 2.6v, it is time to change the battery.
1400
1401
1402 == 5.2 Replace Battery ==
1403
1404
1405 LHT65N has two screws on the back, Unscrew them, and changing the battery inside is ok. The battery is a general CR17450 battery. Any brand should be ok.
1406
1407 [[image:image-20220515075440-2.png||_mstalt="429546" height="338" width="272"]][[image:image-20220515075625-3.png||_mstalt="431574" height="193" width="257"]]
1408
1409
1410 == 5.3 Battery Life Analyze ==
1411
1412
1413 (((
1414 Dragino battery-powered products are all run in Low Power mode. User can check the guideline from this link to calculate the estimated battery life:
1415 [[https:~~/~~/www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf>>https://www.dragino.com/downloads/downloads/LoRa_End_Node/Battery_Analyze/DRAGINO_Battery_Life_Guide.pdf]]
1416 )))
1417
1418
1419 (((
1420 A full detail test report for LHT65N on different frequency can be found at : [[https:~~/~~/www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0>>https://www.dropbox.com/sh/r2i3zlhsyrpavla/AAB1sZw3mdT0K7XjpHCITt13a?dl=0]]
1421 )))
1422
1423
1424 = 6. FAQ =
1425
1426 == 6.1 How to use AT Command? ==
1427
1428
1429 LHT65N supports AT Command set.User can use a USB to TTL adapter plus the Program Cable to connect to LHT65 for using AT command, as below.
1430
1431 [[image:image-20220530085651-1.png||_mstalt="429949"]]
1432
1433
1434 **Connection:**
1435
1436 * (% style="background-color:yellow" %)**USB to TTL GND <~-~->GND**
1437 * (% style="background-color:yellow" %)**USB to TTL RXD <~-~-> D+**
1438 * (% style="background-color:yellow" %)**USB to TTL TXD <~-~-> A11**
1439
1440 (((
1441 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**) (%%)to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1442 )))
1443
1444
1445 Input password and ATZ to activate LHT65N,As shown below:
1446
1447 [[image:image-20220530095701-4.png||_mstalt="430014"]]
1448
1449
1450 AT Command List is as below:
1451
1452 AT+<CMD>? :  Help on <CMD>
1453
1454 AT+<CMD> :  Run <CMD>
1455
1456 AT+<CMD>=<value> :  Set the value
1457
1458 AT+<CMD>=? :  Get the value
1459
1460 AT+DEBUG:  Set more info output
1461
1462 ATZ:  Trig a reset of the MCU
1463
1464 AT+FDR:  Reset Parameters to Factory Default, Keys Reserve
1465
1466 AT+DEUI:  Get or Set the Device EUI
1467
1468 AT+DADDR:  Get or Set the Device Address
1469
1470 AT+APPKEY:  Get or Set the Application Key
1471
1472 AT+NWKSKEY:  Get or Set the Network Session Key
1473
1474 AT+APPSKEY:  Get or Set the Application Session Key
1475
1476 AT+APPEUI:  Get or Set the Application EUI
1477
1478 AT+ADR:  Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1479
1480 AT+TXP:  Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1481
1482 AT+DR:  Get or Set the Data Rate. (0-7 corresponding to DR_X)
1483
1484 AT+DCS:  Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1485
1486 AT+PNM:  Get or Set the public network mode. (0: off, 1: on)
1487
1488 AT+RX2FQ:  Get or Set the Rx2 window frequency
1489
1490 AT+RX2DR:  Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1491
1492 AT+RX1DL:  Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1493
1494 AT+RX2DL:  Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1495
1496 AT+JN1DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1497
1498 AT+JN2DL:  Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1499
1500 AT+NJM:  Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1501
1502 AT+NWKID:  Get or Set the Network ID
1503
1504 AT+FCU:  Get or Set the Frame Counter Uplink
1505
1506 AT+FCD:  Get or Set the Frame Counter Downlink
1507
1508 AT+CLASS:  Get or Set the Device Class
1509
1510 AT+JOIN:  Join network
1511
1512 AT+NJS:  Get the join status
1513
1514 AT+SENDB:  Send hexadecimal data along with the application port
1515
1516 AT+SEND:  Send text data along with the application port
1517
1518 AT+RECVB:  Print last received data in binary format (with hexadecimal values)
1519
1520 AT+RECV:  Print last received data in raw format
1521
1522 AT+VER:  Get current image version and Frequency Band
1523
1524 AT+CFM:  Get or Set the confirmation mode (0-1)
1525
1526 AT+CFS:  Get confirmation status of the last AT+SEND (0-1)
1527
1528 AT+SNR:  Get the SNR of the last received packet
1529
1530 AT+RSSI:  Get the RSSI of the last received packet
1531
1532 AT+TDC:  Get or set the application data transmission interval in ms
1533
1534 AT+PORT:  Get or set the application port
1535
1536 AT+DISAT:  Disable AT commands
1537
1538 AT+PWORD: Set password, max 9 digits
1539
1540 AT+CHS:  Get or Set Frequency (Unit: Hz) for Single Channel Mode
1541
1542 AT+CHE:  Get or Set eight channels mode,Only for US915,AU915,CN470
1543
1544 AT+PDTA:  Print the sector data from start page to stop page
1545
1546 AT+PLDTA:  Print the last few sets of data
1547
1548 AT+CLRDTA:  Clear the storage, record position back to 1st
1549
1550 AT+SLEEP:  Set sleep mode
1551
1552 AT+EXT:  Get or Set external sensor model
1553
1554 AT+BAT:  Get the current battery voltage in mV
1555
1556 AT+CFG:  Print all configurations
1557
1558 AT+WMOD:  Get or Set Work Mode
1559
1560 AT+ARTEMP:  Get or set the internal Temperature sensor alarm range
1561
1562 AT+CITEMP:  Get or set the internal Temperature sensor collection interval in min
1563
1564 AT+SETCNT:  Set the count at present
1565
1566 AT+RJTDC:  Get or set the ReJoin data transmission interval in min
1567
1568 AT+RPL:  Get or set response level
1569
1570 AT+TIMESTAMP:  Get or Set UNIX timestamp in second
1571
1572 AT+LEAPSEC:  Get or Set Leap Second
1573
1574 AT+SYNCMOD:  Get or Set time synchronization method
1575
1576 AT+SYNCTDC:  Get or set time synchronization interval in day
1577
1578 AT+PID:  Get or set the PID
1579
1580
1581 == 6.2 Where to use AT commands and Downlink commands ==
1582
1583
1584 **AT commands：**
1585
1586 [[image:image-20220620153708-1.png||_mstalt="429806" height="603" width="723"]]
1587
1588
1589 **Downlink commands:**
1590
1591
1592
1593 (% style="color:blue" %)**TTN:**
1594
1595 [[image:image-20220615092124-2.png||_mstalt="429221" height="649" width="688"]]
1596
1597
1598
1599 (% style="color:blue" %)**Helium：**
1600
1601 [[image:image-20220615092551-3.png||_mstalt="430794" height="423" width="835"]]
1602
1603
1604
1605 (% style="color:blue" %)**Chirpstack: The downlink window will not be displayed until the network is accessed**
1606
1607
1608 [[image:image-20220615094850-6.png||_mstalt="433082"]]
1609
1610
1611 [[image:image-20220615094904-7.png||_mstalt="433485" height="281" width="911"]]
1612
1613
1614
1615 (% style="color:blue" %)**Aws:**
1616
1617 [[image:image-20220615092939-4.png||_mstalt="434460" height="448" width="894"]]
1618
1619
1620 == 6.3 How to change the uplink interval？ ==
1621
1622
1623 Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/||_mstmutation="1" style="background-color: rgb(255, 255, 255);"]]
1624
1625
1626 == 6.4 How to use TTL-USB to connect a PC to input AT commands? ==
1627
1628
1629 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1630
1631 [[image:1655802313617-381.png||_mstalt="293917"]]
1632
1633
1634 (((
1635 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600** (%%)to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**(% style="color:red" %))(%%) to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1636 )))
1637
1638
1639 Input password and ATZ to activate LHT65N,As shown below:
1640
1641 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1642
1643
1644 == 6.5 How to use TTL-USB to connect PC to upgrade firmware? ==
1645
1646
1647 [[image:image-20220615153355-1.png||_mstalt="430222"]]
1648
1649
1650 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1651
1652 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1653
1654
1655
1656 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1657
1658 First connect the four lines；(% style="display:none" %)
1659
1660 [[image:image-20220621170938-1.png||_mstalt="431340" height="413" width="419"]]，(% style="display:none" %)
1661
1662
1663 Then use DuPont cable to short circuit port3 and port1, and then release them, so that the device enters bootlaod mode.
1664
1665 [[image:image-20220621170938-2.png||_mstalt="431704"]]
1666
1667
1668
1669 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1670
1671 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1672
1673
1674 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1675
1676
1677 When this interface appears, it indicates that the download has been completed.
1678
1679 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1680
1681
1682 Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1683
1684
1685 == 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1686
1687
1688 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1689
1690
1691 [[image:image-20220623112117-4.png||_mstalt="428350" height="459" width="343"]]
1692
1693
1694 (((
1695 In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600** (%%)to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**(% style="color:red" %))(%%) to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1696 )))
1697
1698
1699 Input password and ATZ to activate LHT65N,As shown below:
1700
1701 [[image:image-20220615154519-3.png||_mstalt="431925" height="672" width="807"]]
1702
1703
1704 == 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1705
1706
1707 [[image:image-20220623110706-1.png||_mstalt="427869"]]
1708
1709
1710 (% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1711
1712 [[image:image-20220615170542-5.png||_mstalt="430638"]]
1713
1714
1715
1716 (% _mstmutation="1" style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1717
1718 First connect the four lines；
1719
1720 [[image:image-20220623113959-5.png||_mstalt="433485" height="528" width="397"]]
1721
1722 Connect A8 and GND with Dupont wire for a while and then separate，enter reset mode
1723
1724
1725
1726 (% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1727
1728 [[image:image-20220615171334-6.png||_mstalt="431028"]]
1729
1730
1731 Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1732
1733
1734 When this interface appears, it indicates that the download has been completed.
1735
1736 [[image:image-20220620160723-8.png||_mstalt="430703"]]
1737
1738
1739 Finally,Disconnect 3.3v，Connect A8 and GND with Dupont wire for a while and then separate，exit reset mode
1740
1741
1742 == 6.8 Why can't I see the datalog information ==
1743
1744
1745 ~1. The time is not aligned, and the correct query command is not used.
1746
1747 2. Decoder error, did not parse the datalog data, the data was filtered.
1748
1749
1750 = 7. Order Info =
1751
1752
1753 Part Number: (% style="color:#4f81bd" %)** LHT65N-XX-YY**
1754
1755 (% style="color:#4f81bd" %)**XX **(%%): The default frequency band
1756
1757 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AS923**(%%): LoRaWAN AS923 band
1758 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1759 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1760 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1761 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1762 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**US915**(%%): LoRaWAN US915 band
1763 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**IN865**(%%): LoRaWAN IN865 band
1764 * (% style="color:#4f81bd" %)** **(% _mstmutation="1" style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1765
1766 (% style="color:#4f81bd" %)**YY**(%%): Sensor Accessories
1767
1768 * (% style="color:red" %)**E3**(%%): External Temperature Probe
1769
1770
1771
1772 = 8. Packing Info =
1773
1774
1775 **Package Includes**:
1776
1777 * LHT65N Temperature & Humidity Sensor x 1
1778 * Optional external sensor
1779
1780 **Dimension and weight**:
1781
1782 * Device Size:  10 x 10 x 3.5 mm
1783 * Device Weight: 120.5g
1784
1785
1786
1787 = 9. Reference material =
1788
1789
1790 * [[Datasheet, photos, decoder, firmware>>https://www.dropbox.com/sh/una19zsni308dme/AACOKp6J2RF5TMlKWT5zU3RTa?dl=0]]
1791
1792
1793
1794 = 10. FCC Warning =
1795
1796
1797 This device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:
1798
1799 (1) This device may not cause harmful interference；
1800
1801 (2) this device must accept any interference received, including interference that may cause undesired operation.
1802
1803
1804